The OEM's web site offers updates - If you have a brand name PC, like Dell, you can visit their site and enter your Service Tag (or model type if you don't have it). For add-on cards, like video or sound, visit the chipset manufacturer (ATI, AMD, NVIDIA etc...)

okay thank you guys, it is ati radeon hd 5450 is the name, chip is amd radeon graphic processor {ox68f9} manafactor is advanced micro devices inc.{mhz}. and the date is 7-27-12, and the version is 6.1400107270.